Method of fabricating metal printed wiring boards

Details Method of fabricating metal printed wiring boards Method of fabricating metal printed wiring boards

1974-04-15

1976-01-27

Lanham, C. W.

Metal working

Method of mechanical manufacture

Electrical device making

53 30S, 174 685, 317101B, 427 27, 427 28, 427 96, 427 97, H05K 310

Patent

active

039343340

ABSTRACT:
An additive process for producing printed wiring boards is taught. In the process metal substrates having desired hole patterns are powder coated with a dielectric material electrostatically. The dielectric powder coating is then fused on the metal substrate. Next, a continuous film of pre-catalyzed adhesive is applied to all surfaces; then a plating resist is applied to all areas on which copper is not desired. The exposed catalyzed adhesive is then activated and plated in an electroless copper bath.

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patent: 3704208 (1972-11-01), Russo
patent: 3745095 (1973-07-01), Chadwick et al.
patent: 3778532 (1973-12-01), Braden

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